how much has pacquiao's body really changed?

Hard work, baby. excellent genetics as well

 

Considering the fact that as FM jr has gotten older BUT stronger, retained his speed, and his incredible level of fitness, it stands to reason that he is on PED's.

 

With the "steroid era" we also had advancements on scientific trainings. People fail to realize that while Pac was winning on the lower weights he was purely riding on his athleticism. He was a raw, badly trained, poorly nourished boy riding on his god given gifts. Two different versions of Pac, two very different circumstances surrounding him.